Oh Costco, you keep being you. Was looking for water Iron safe water softeners. It's pretty obvious but I did mention it to one of the employees, dunno if any results followed :
Hydrosoft Water Softening Salt Tablets, 25kg | Costco UK
No, There Isn't A Nationwide Costco Water Bottle Shortage - The Krazy Coupon Lady
Solar Water Softener Salt, 20kg | Costco
Morton Pure and Natural Water Softener Crystals, 44 lbs | Costco
Nature's Own Water Softener Crystals 40 lbs | Costco
Costco Business Center Is Better Than Regular Costco, Some Say
Sifto Crystal Plus 20kg Water Softener Salt | The Home Depot Canada
Morton Clean and Protect Water Softener Pellets, 44 lbs | Costco